Feigen's next big moment could lead to London

LLUIS GENE/AFP / Getty Images

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(From top) US swimmer James Feigen, US swimmer Nathan Adrian and Brazil's Marcelo Chierighini compete in the final of the men's 100-metre freestyle swimming event in the FINA World Championships at Palau Sant Jordi in Barcelona on August 1, 2013.

LLUIS GENE/AFP / Getty Images

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(From top) US swimmer James Feigen, US swimmer Nathan Adrian and Brazil's Marcelo Chierighini compete in the final of the men's 100-metre freestyle swimming event in the FINA World Championships at Palau Sant Jordi in Barcelona on August 1, 2013.